A-12 Blackbird tail number 927 on display at the California Science Center.
This aircraft was held in storage at Air Force Plant #42 for many years
and was one of the last Blackbirds to be released to a museum. This
was the only dual control version of the A-12 that was built. Since the
A-12 was a single seat aircraft, a second cockpit was grafted into the
aircraft to add the second set of controls.